How did you get up to speed in your niche?

This is my first day in your community so I'm looking forward to getting to know you better.

I came here to see if I can pick someone's brain on how they got up to speed in the technology niche. I spent far too many years in Investment industry sales and marketing so I'm looking for a new uptick market. I love strategy and technology so I'm claiming my space in business intelligence. However, I'm going to admit to being a little intimidated by jargon. Any tips?